close

Вход

Забыли?

вход по аккаунту

?

Патент USA US3086431

код для вставки
April 23, 1963
n. c. HAMMAN
3,086,421
SHEET METAL NUT HAVING REGULAR POLYGONAL OPENING
Filed Aug. 29, 1958
WITH HELICALLY DEFLECTED EDGES
2 sheetswsheet 1
INVENTOR.
1km??? CJ/mmm
April 23, 1963
D. c. HAMMAN
3,086,421
SHEET METAL NUT HAVING REGULAR POLYGONAL OPENING
Filed Aug. 29, 1958
WITH HELICALLY DEFLECTED EDGES
2 Sheets-Sheet 2
'
INVENTOR.
Jeni/e7’ éj/ammm
gQZww/M/
United States Patent“ 0
3,086,42 l'
Patented Apr. 23, 1963
1
3 086 421
SHEET METAL NUT
REGULAR POLYC
ONAL OPENING W I T H HELICALLY DE
FLECTED EDGES
Denver C. Hamman, Palatine, 111., assignor to Illinois
2
FIG. 4 is a sectional view taken along line 4—4 in
FIG. 3;
FIG. 5 is an enlarged fragmentary sectional view show
ing an assembly including the nut member of the present
invention in greater detail;
FIG. 6 is an enlarged fragmentary plan view of a nut
member of the present invention showing a feature of the
structure in greater detail;
FIG. 7 is a plan view showing a nut member embody
The present invention relates to a novel fastening de 10 ing a modi?ed form of the present invention;
vice, and more particularly to a novel sheet material nut
FIG. 8 is a cross sectional view taken along the line
member.
8-8 in FIG. 7;
The present invention contemplates a sheet material
FIG. 9 is an enlarged sectional view taken along line
nut member which is adapted to be applied to an un
9--9 in FIG. 7;
threaded stud. It has been proposed to provide sheet ma
FIG. 10 is a plan view showing another embodiment of
Tool Works, Inc., a corporation of Delaware
Filed Aug. 29, 1958, Ser. No. 758,016
5 Claims. (Cl. 85-32)
terial nut members with means adapted to form or cut
complementary threads in an unthreaded stud member
during initial assembly ‘of the parts. However such here
the present invention;
FIG. 11 is a cross sectional view taken along line 11—
11 in FIG. ‘10, and
tofore proposed nut members have not always been en
FIG. 12 is a sectional view taken along line 12—12
tirely satisfactory for various reasons. For example, cer 20 in FIG. 10.
tain of the prior proposals have been unduly di?icult and
Referring now more speci?cally to the drawings where
expensive to manufacture or subject to breakage as a
in like parts are designated by the same numerals through
result of constructions which cause concentration of
out the various ?gures, a fastener or nut member 10‘ is
stresses during application of the nut members to un
shown, which nut member is formed from suitable sheet
threaded studs. ‘In addition certain constructions which 25 material such as sheet steel. As will be discussed more
have been proposed do not have su?icient holding power
in detail below, the nut member 10 is particularly adapted
for many installations or are not capable of easy and fast
application to a stud in a manner which insures proper
formation of the desired threads on the studs.
It is an important object of the present invention to pro
vide a novel sheet material nut member adapted to be
applied to an unthreaded stud, which nut member may be
relatively easily and economically produced and is con
to be applied to a stud member 12 having a shank 14
which is initially smooth or unthreaded. It will be appre
ciated that the nut and stud members may be used in vari
ous assemblies for connecting workpieces 16 and 18.
The one piece sheet material nut member 18 comprises
a hollow central body 26 provided by an axially extend
ing wall having a non-circular or hexagonal peripheral
structed so as to have improved strength and holding
con?guration so as to facilitate turning of the nut mem
power.
35 ber by suitable tool means, not shown. An end wall 22
A more speci?c object of the present invention is to pro
is formed integrally with and extends radially inwardly
vide a novel sheet material nut member adapted to form
from an outer end margin of the body 20, which end wall
or cut complementary thread means in an unthreaded
is provided with stud accommodating central aperture
stud member, which nut member is constructed so as to
means 24 which will be described more in detail below.
minimize stress concentrations therein during application 40 A peripheral annular ?ange 26 extends axially and ra
to a stud member so as to reduce any possibility of break
dially outwardly from an integral junction with an inner
age of the nut member.
end of the body 20 so as to substantially increase the effec
A further object of the present invention is to provide
a novel sheet material fastener of the above described
type which is constructed so that it may be relatively
rapidly advanced onto a stud while still providing im
proved holding power.
Another more speci?c object of the present invention
' is to provide a novel sheet material nut member of the
tive clamping area of the nut member. In addition, the
?ange 26 may be resiliently de?ected when the nut mem
her is tightened against a workpiece so as to provide a
spring action which causes the nut member to bind on the
stud so as to resist unauthorized retrograde movement.
It is to be noted that the ?ange 26 is preferably inclined
at an angle of about 25° with respect to a plane contain
above described type which ‘is constructed so that upon 50 ing the peripheral edge of the ?ange since this structure
seating of the nut member against a workpiece, the driv
enables the ?ange to function in the desired manner and
ing torque arises abruptly to a value higher than the
provides the flange with improved resistance to undue or
stripping torque so as to resist the milling of an annular
complete ?attening or axial collapsing.
groove in the workpiece.
For certain ‘installations it is desirable to provide an
Still another object of the present invention is to pro 55 annular body 28 of priable sealing material within the
vide a novel sheet material workpiece of the above de
nut as shown in FIG. 5 so as to prevent the passage of
scribed type which is constructed so that in the event the
air, moisture, ‘dust or other foreign material through the
nut member is over driven to a point where the thread
apertures in the workpieces. The ?ange 26 is formed so
formed on the stud member is stripped, the nut member
as to present a relatively sharp peripheral edge for en
60 gagement with the workpiece 18 for preventing the es
will cut or form new threads upon removal thereof.
Other objects and advantages of the present invention
cape of any of the sealing material around a major por
will become apparent from the following description and
the accompanying drawings wherein:
tion of the ?ange periphery. However, the ?ange is
provided with a plurality of relatively small peripheral
recesses 30, 32 and 34 into which portions of the sealing
FIG. 1 is a fragmentary perspective view showing a nut
member incorporating features of the present invention 65 material are extruded as shown in FIG. 5. This provides
assembled with a complementary stud member and a work
a mechanical interlock between the sealing material and
structure;
FIG. 2 is an enlarged fragmentary partial sectional view
taken along line 2——2 of the assembly shown in FIG. 1;
the nut body which aids in preventing the sealing com
FIG. 3 is a further enlarged plan view of a nut member
incorporating features of the present invention;
pound from shearing loose from the nut member during
a tightening operation.
These notches or recesses also
70 serve to present corners 36, 38 and 40 which are adapted
aggressively to engage the workpiece 1-8 during a driving
3,086,421
3.
4
or tightening operation when the nut member has been
tightened the desired amount. This engagement of the
corners with the workpiece causes the driving torque to
structures in that the peripheral margin of the ?ange 26b
is polygonal in con?guration rather than circular so that
rise abruptly higher than the torque necessary to strip
straight edges ‘57 thereof. 'In the speci?c embodiment
the threads on the stud.
shown, the ?anges 26b is provided with an octagonal pe
ripheral con?guration. With this structure, successive
straight edge sections of the ?ange periphery will not
track each other during tightening of the nut member
against a workpiece so as to minimize any possibility
This prevents the nut member
from being rotated after the desired tightening has been
accomplished so as to cause milling of an ‘annular groove
in the workpiece.
workpiece engageable corners 55 are presented between
It is to be noted that in accordance with the present
invention, the aperture means 24 in the end wallj22 is 10 of injury to the workpiece and so as to improve the en
gagement of the corner portions with the workpiece in
in the form of a polygonal ?gure. As shown in FIG. 3,
this'?gure is preferably a substantially equilateral tri
a manner which restrains unauthorized retrograde move
angle although for certain applications a square ?gure
ment of the nut.
would be suitable. The corners of the triangular opening
While the preferred embodiments of the present in
vention have been shown and described herein, it is‘ obvi
are rounded in the manner shown so as to minimize any
possibility of a crackoccurring at such corners. It is fur
ther to be noted that an intermediate portion of each
ous that many structural details may be changed (With
the stud are stripped and the nut has milled an annular
groove around the stud.
FIGS. 7-9 show a slightly modi?ed form of the present
invention which is similar to the structure described above
as indicated by the application of identical reference nu
merals with the su?ix “a” added to corresponding ele
section extending uninterruptedly from the straight side
ments. This embodiment differs only in that the periph
prising a hollow'axially extending body portion having
out departing from the spirit and scope of the appended
claims.
side edge‘of the polygonal ‘central opening means 24 is
helically de?ected along the circumference of'a circle so
The invention is claimed as follows:
1. A one piece sheet material rotary nut member suit
as to provide thread segments '42, 44 and 46.‘ The di 20
ameter of the circle of the arcuately and helically dis
able for application to an unthreaded stud comprising an
axially thin substantially planar section disposed trans
posed thread segments is greater than the diameter of a
circle which is tangent to all of the edges of the central '
versely of an axis of rotation of the nut member, said
section having a generally centrally disposed equilateral
opening 24 and less than the diameter of another circle
triangular aperture means therethrough de?ned by initial
which includes all of the corners of the opening means 24.
ly substantially straight uninterrupted side edges extend
It has been found that the above mentioned construction
ing entirely between corners of the triangular aperture
which is obtained by de?ecting the segments 42, 44 and
46 from initially straight margins of the central open
means, intermediate portions of said edges located sub
ing has substantially improved strength and resistance to
stantially centrally between and spaced from corners of
cracking or breaking under the stresses on the nut mem 30 said triangular aperture .eans and entirely within a
ber ‘during application to an unthreaded stud. It will be
circle disposed within said corners being helically de?ected
appreciated that the arcuately and helically de?ected
to provide a helical edge portion with a leading end sub
thread segments 42, 44 and 46 are also inclined so as
stantially in the plane of said section and a trailing end
to present relatively sharp helically disposed corners 48,
out of the plane of said section, each helical edge por
50 and 52 respectively which are adapted aggressively to
tion being a portion of an individual helix disposed for
engage the stud shank 14 and form a plurality of sepa
threadedly engaging the stud whereby three individual
rate complementary thread segments 54 therein.
threads are formed on said stud, and said nut member
As' shown best in FIG. 6, the junction 56 between the
having inclined edge portions providing junctions be
trailing end of the thread segment 44 and the straight edge
tween trailing ends of said helical edge portions and said
of the central opening is rounded. The thread segments
substantially straight edges, which junctions are rounded
42 and 46 are provided with similar rounded corners 58
with an arch of substantial radius reversely directed with
and 60 at the junctions of their trailing ends with the
respect to said helical edge portions for facilitating
straight edges of the polygonal opening. With this struc
threaded engagement of the helical portions with said stud
ture, the thread segments are adapted to form comple
upon reverse rotation of the nut member, each said heli
mentary threads in the stud shank during reverse rota
cal edge portion and inclined edge portion being radially
tion of the nut member. This feature facilitates removal
outwardly with respect to said axis of a plane perpendicu
of the nut in situations where the nut is inadvertently
lar to said section which contains the straight edge por
overdriven to a point where the ?rst threads formed in
tions on either side thereof, the material of said planar
edge at one side of said helical edge portion to the straight
side edge on the opposite side of said helical edge portion
to provide back-up strength for said helical edge portion
and said inclined edge portion.
2. A one piece sheet material rotary nut member com
eral ?ange ‘26a is formed so that it includes a plurality
a noncircular transverse cross section, a substantially
of ?at sections 51 integrally joined to each other by
planar transverse end wall integral with outer end of said
corner or rib portions 53. The corner or rib portions 53
which are relatively sharply bent as shown best in FIG. 9
provide the ?ange 26a'with substantial improved resist
body portion, said wall having a generally centrally lo
cated substantially equilateral polygonal aperture means
therethrough de?ned by at least three initially substan
ance to undue collapsing when the nut member is clamped
tially straight edges extending substantially directly and
against the workpiece, and the substantially ?at inclined
without interruption between corners of the aperture
means, intermediate portions of said edges located sub~
side sections or portions 51 provide a strut action which
further increases the resistance of the ?ange to axial col
lapsing.
In FIGS. l0~12 there is shown another modi?ed form
of the present invention which is similar to the structures
described above ‘as indicated by the application of identi
cal reference numerals with the su?ix “b” added to cor
responding elements. This embodiment illustrates the
manner in which the body portion 2012 may be formed
in various di?erent shapes. More speci?cally the em~
stantially centrally between corners of the aperture means
being helically de?ected to provide'a helical edge por
tion with a leading ‘end substantially in the plane of
said end wall and a trailing end out of the plane of said
end wall, each helical edge portion being a portion of
an individual helix disposed for threadedly engaging a
stud member and the like whereby three individual threads
are ‘formed on said stud, said nut member having in
clined edge portions providing junctions between trail
bodiment shows the body portion 26b as having a rec
tangular or square shape rather than a hexagonal shape. ,
ing ends of said helical edge portions and said substan
tially straight edges, which junctions are rounded with
This embodiment also differs from the above described
an arch of substantial radius reversely directed with
3,086,421
6
respect to said helical edge portions for facilitating
threaded engagement of the helical portions with said
5. A one piece sheet material rotary nut member, as
de?ned in claim 2, wherein said annular ?ange has a
stud upon reverse rotation of the nut member, each said
polygonal peripheral edge and includes corner portions
helical edge portion and inclined edge portion being
extending for engagement with a workpiece.
radially outwardly with respect to said axis of a plane 5
perpendicular to said end wall which contains the straight
edge portions on either side thereof, the material of said
References Cited in the ?le of this patent
UNITED STATES PATENTS
planar end wall extending uninterruptedly from the
straight side edge at one side of said helical edge portion
to the straight side edge on the opposite side of said 10
helical edge portion to provide back-up strength for said
helical edge portion and said inclined edge portion and
a generally dome shaped annular ?ange integral with an
end of said body portion opposite from said end wall,
said ?ange extending radially outwardly and being in
15
clined axially away from said end wall at an angle of
about 25° with respect to a plane containing a peripheral
margin of the ?ange.
,3. A one piece sheet material nut member, as de?ned
in claim 2, wherein said ?ange includes circumferentially 20
spaced relatively small peripheral recess means present
ing corners engageable with a workpiece for resisting
rotation of the nut member relative to the workpiece
when the nut member is tightening against the workpiece.
779,751
Waitt _______________ _._ Jan. 10, 11905
932,396
Kenney _____________ __ Aug. 24, 1909
2,259,425
Murphy ______________ __ Oct. 14, .1941
2,284,081
2,335,205
2,335,367
Beggs ______________ __ May 26, 1942
Zepp _______________ _._ Nov. 23, 1943
Thompson ___________ __ Nov. 30, 1943
2,398,827
2,734,547
2,761,349
2,794,476‘
Graham ____________ __ Apr. 23,
Hotchkin ____________ __ Feb. 14,
Heller _______________ __ Sept. 4,
Hanneman ____________ __ June 4,
27,895,362’
2,928,445
2,930,424
2,969,705
Jamgotchian _, _________ __ July 21, 1959
Van Buren ___________ __ Mar. 15, 1960
Van Buren ___________ _._ ‘Mar. 29, 1960
2,986,059
Dulfy _______________ __ May 30, i19611
4. A one piece sheet material nut member, as de?ned 25
Becker ______________ __ Jan. 3.1, 1961
OTHER REFERENCES
in claim 2, wherein said annular ?ange comprises cir
cumferentially arranged substantially planar sections, and
generally radially extending rib portions disposed between
and integrally joining said planar sections.
1946
1956
195-6
1957
Automotive Industries, volume 115, page 141, Oct. 15,
1956.
Документ
Категория
Без категории
Просмотров
0
Размер файла
577 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа